Omega Owners Forum
Omega Help Area => Omega General Help => Topic started by: Entwood on 19 March 2010, 15:49:06
-
Just had "pigtown" around to recheck his codes and I is confused.
Car is a 2.2 petrol
When you turn the igntion on the EML light illuminates but the Emissions one does not.
When you start the engine the EML light goes out instantly.
When I put the code reader on it tells me the EML light is ON (visually it's not) and that the following codes are present:
P0140 - O2 sensor B1 S2
P0170 - Fuel Trim
P0340 - Camshaft Position Sensor malfunction
P0650 - MIL light circuit malfunction.
I've succesfully cleared all the codes again.
The only new code is the P0340.
My confusion is why isn't the EML light ON .. as the reader says it should be, and we know it comes on with the igntition on.
Those faults SHOULD, I believe, put the EML light on, and not the emissions light - but I await expert opinion on that.... please ?
I just wonder if some devious previous owner has physically swapped the EML and emissions lights over, so that the EML "appears" to test - but in fact is the emissions light testing, and the actual EML light is in the emissions "slot" with no bulb ??? Seems to be a way of disguising problems.. ??
If this, rather far-fetched, idea is correct .. it means that when he had the previous "hiccup" and the light came on then it was an Emissions problem .. not a gearbox one ..
Am I being too clever by half here ??? :(
-
I think it's saying the emissions light is on. ;)
Can't remember what it calls the EML but it doesn't make much sense.
If P0340 is the only present fault it would only be the emissions light. Does the code reader say if the others are present or stored?
EDIT: Disregard the above. I got 0340 confused with 0430. I agree something's odd. :-/
You can manually illuminate the lights to check them on a Tech 2 using actuator test IIRC.
Kevin
-
I've heard reports of a faulty cam sensor causing the gearbox to misbehave too.
Kevin
-
So if I read you right ... :)
Faults SHOULD put EML on and it's not .. my theory could be right.
From previous posts O2 and fuel trim could be O2 sensor or damaged wiring from exhaust change
Cam sensor could have caused the gearbox "hiccup"
Methinks the sequence of events should be...
1. Clocks out to check bulb position/fitment
2. Check wiring to O2 sensor and/or replace O2 sensor
3. Replace cam sensor
Does that sound reasonable ??
-
Post & responses before i even got home!
As Entwood says the 0340 code is new this time since he cleared them last week. Strange thing is the gearbox has been right as rain this week. In fact I haven't noticed any problems since the codes were cleared last week so was a bit suprised to see any new codes.
Should I be thinking of chaging the cam sensor or wait and see?
-
A thought ( Iknow .. rare thing !! )
What is there, that is easily accesible on the 2.2, that can be unplugged and should put the EML light on straight away ???
That way we can test my theory simply .... :)
-
The cam sensor causes all sorts of issues on the 2.2 including gearbox faults... a cam sensor fault code is conclusive proof!
-
I would change the cam sensor first and see what happens.
Kevin
-
Okies Mr P, .. I've looked up the cam shaft sensor change on TIS .. seems fairly simple .. if you want a hand to do it just yell, (no "how to" here so we might make one ??) I also have a TC for Skurrays if you need it.
The "clocks out" procedure looks simple enough as well if you want to check the bulbs as we discussed.
O2 sensor is a tad more thought provoking ... is it worth you getting a 2nd hand one of a breaker and trying that ... would possibly prove if it is the wiring or the sensor ?? and will no doubt be cheaper than new ??
Up to you .. let me know how you wish to procede .. :)
-
The cam sensor doesn't always put the light on, it's the erronious codes it throws up that does. ;)
-
Vic has already contributed a HOWTO for cam sensor replacement which I've been a bit tardy about uploading. I'll try and do so tonight. :y
Kevin
-
Just read it :y :y :y :y :y
http://www.omegaowners.com/forum/YaBB.pl?num=1269023972
tick VG .. :)
-
Pictures to follow. :y
Kevin
-
Watch the EML carefully, if it appears to go out at the same time as (say) the oil light then there is a good chance that an Arthur Daly character has cut a track on the dash circuit board and linked the eml to one of the other lights rather than fix the real problem.
-
Watch the EML carefully, if it appears to go out at the same time as (say) the oil light then there is a good chance that an Arthur Daly character has cut a track on the dash circuit board and linked the eml to one of the other lights rather than fix the real problem.
woo, cheaky tinkers :o, you have experienced this by the sound of it?
...just been out to look on mine, all be it a 3.2, and watched the lights as the engine starts and they all go out in turn in order. Never bothered me arse to look before. ::)
-
I would change cam sensor anyway - its fooked. Tends to cause poor starting, and gearbox limp, sometimes a low rev limit.
The trim and o2 codes - what is the live data reading for the BLM long and short term trims, and live data on the o2 sensors (pre cat should cycle between rich/lean about once a sec, post cat stay lean)
-
I would change cam sensor anyway - its fooked. Tends to cause poor starting, and gearbox limp, sometimes a low rev limit.
The trim and o2 codes - what is the live data reading for the BLM long and short term trims, and live data on the o2 sensors (pre cat should cycle between rich/lean about once a sec, post cat stay lean)
Can't get these unless Mr P returns for another "reading"... :(
-
Post & responses before i even got home!
As Entwood says the 0340 code is new this time since he cleared them last week. Strange thing is the gearbox has been right as rain this week. In fact I haven't noticed any problems since the codes were cleared last week so was a bit suprised to see any new codes.
Should I be thinking of chaging the cam sensor or wait and see?
Try hot starting it a few times.....ie give it 10-15mins after turning a hot engine off....then start it......i suspect you will get g/b issues back.
Which will through up a P0340, and is cam sensor causing it. Change it. And can be done without removing any belts, as iirc TIS says you have to do.
Not on TC tho and about £50 from vx dealer.
BTW when you get g/b issue of it trying to pull away in 3rd gear, use the selector to override it and select 1st/2nd manually :y
-
might be worth cleaning the sensor first, one i did was covered in iron filings from somewhere, its magnetic obviously.
-
Watch the EML carefully, if it appears to go out at the same time as (say) the oil light then there is a good chance that an Arthur Daly character has cut a track on the dash circuit board and linked the eml to one of the other lights rather than fix the real problem.
Had this done to my '98 2.5 by a previous owner. ECU light shoud have been on due to a fault that was a pig to fix, but they cut the track and wired it to the ignition light! Cheeky wotsits. I put a picture of it up at the time ..... Took me blooming ages to sort
-
Had a look at the light today and it seems to go out in sequence ie. not with another light.
Took the cam sensor out to clean it thanks to the guide. It was pretty clean so I don't think that was the problem. My local dealer was closed by the time I got to it so couldn't get a new one. I'll see how it runs and get one next week.